Primitive arthropods, Biology

Assignment Help:

Primitive Arthropods

The primitive arthropods, Onychophora (for example Peripatus) have a series of paired legs which are not jointed but have a ringed appearance because of the presence of rows of papillae on them. Each leg consists of two parts, a conical proximal part along with their extrinsic muscles, and a small distal part comprising a pair of claws.

183_Primitive Arthropods.png

Figure: Peripatus lateral view of head

The limbs are protracted and retracted. Using these legs, and through extension and contraction of the body for working the legs they crawl. While a segment is extended, the legs are lifted and moved forward; subsequent effective stroke provides the animals a pushing force.


Related Discussions:- Primitive arthropods

Assessment of peripheral vascular perfusion (beside test), Assessment of Pe...

Assessment of Peripheral Vascular Perfusion (Beside Test) Burger's Postural Test Perform in daylight.  Place patient supine with both legs elevated and knees

FISHERIES, skeletal system of fish .exoskeleton and endoskeleton

skeletal system of fish .exoskeleton and endoskeleton

What are the physical propertie of sol, What are the physical propertie of ...

What are the physical propertie of sol Sols resemble liquids in their main physical properties - that is, they flow and they do not show rigidity of form. However, when a sol a

Define foam spray drying method, Define Foam Spray Drying Method? This...

Define Foam Spray Drying Method? This is an extension of spray drying and involves the use of gases dissolved under pressure prior to spraying. The main advantage is that the

Define milk as a rich source of protein, Define Milk as a rich source of pr...

Define Milk as a rich source of protein? A value of 3.5% protein is often considered as an average for milk. Milk protein has traditionally been divided into 2 classes - casein

2-dimensional echocardiography constrictive pericarditis, Q. 2-Dimensional ...

Q. 2-Dimensional Echocardiography constrictive pericarditis? Thickened pericardium can be detected. In about a third of patients there will be associated some degree of perica

Define food availability and food access, Define Food availability and Food...

Define Food availability and Food Access? Food availability: This refers to availability of necessary types of food in sufficient quantity, to the individual. The sources may b

Pollination, Pollination Pollination refers to the transfer of pollen...

Pollination Pollination refers to the transfer of pollen from dehiscing anthers to the pistil. Unlike animals, plants cannot move to their mates for sexual reproduction. Henc

Are coloured bodies composed of proteins and dna, Chromosomes, coloured bod...

Chromosomes, coloured bodies, are composed of proteins and DNA; so are chromatids. At metaphase I there are 46 chromosomesaligned in pairs along the human cells equatorial plate. A

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd